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The London and South Western Railway (LSWR) 0298 Class or Beattie Well Tank is a class of British steam locomotive. They are 2-4-0WT well tanks, originally built between 1863 and 1875 for use on passenger services in the suburbs of London, but later used on rural services in South West England. Out of a total production of 85, two locomotives have been preserved in an operational condition. == History == In 1850, the LSWR decided that the London suburban passenger services should be operated using small tank locomotives. To determine the most suitable type, Joseph Hamilton Beattie, the LSWR Mechanical Engineer, prepared a series of designs for six-wheeled well tank locomotives, each of which incorporated one or more differences from the previous class. A small quantity of each was produced: between 1852 and 1859, 26 were built, to six different designs. These were the ''Tartar'' and ''Sussex'' classes of 1852, the ''Chaplin'' and ''Minerva'' classes of 1856, the ''Nelson'' class of 1858 and the ''Nile'' class of 1859. The wheel arrangement was either 2-2-2WT or 2-4-0WT; the driving wheels varied between and in diameter; the cylinder bore varied between ; the stroke was either ; and there were other changes. Having chosen the most suitable characteristics, Beattie prepared a standard design of 2-4-0 well tank with driving wheels and cylinders , bore by stroke; and the LSWR began to take delivery of these in 1863. The new design eventually totalled 85 locomotives; most came from the Manchester firm of Beyer, Peacock and Company between 1863 and 1875, but three were built in the LSWR workshops at Nine Elms during 1872. Their numbers were 33, 34, 36, 44, 76, 177–220, 243–270, 298, 299, 314 and 325–329. The locomotives were built as follows: The locomotives delivered in February 1863 were the first locomotives on the LSWR not to be given names. Five of the later locomotives were named: 33 ''Phœnix''; 34 ''Osprey''; 36 ''Comet''; 44 ''Pluto''; 76 ''Firefly''; these names were generally taken from older locomotives which had carried the same numbers.〔 In a well tank locomotive, the water tanks are not mounted above the footplate, but are set low down. On these locomotives, there were two tanks, both between the frames: one was above the leading axle, the other beneath the cab footplate. Although a standard design, there were periodic changes - the cylinder bore was enlarged to from no. 189 and again to for the three Nine Elms engines; and the last twelve, of 1874–75, had cylinders . The three Nine Elms locomotives, and the last six of 1875, exhibited more obvious detail differences compared to the other 76: the leading wheels were diameter instead of ; two of the four safety valves were larger; but the most noticeable difference was that the splashers were rectangular instead of round. These resembled side tanks, but carried no water—this feature was introduced by J.H. Beattie's son and successor, William George Beattie,〔 who had taken office on 23 November 1871 after his father's death on 18 October. They handled heavy loads with ease, and were fast runners. From 1890, when newer locomotives became available for the London suburban services,〔 the Beattie 2-4-0WTs were sent to depots outside the London area. Some of their new duties required a greater water capacity than the tanks could contain, and so 31 were converted to tender engines between 1883 and 1887; these were withdrawn between 1888 and 1898. Of the remainder, most were withdrawn between 1888 and 1899, but six (nos. 44, 257, 266, 298, 314, 329) were modernised between 1889 and 1894 for use on branch lines such as those to and . Three of these, nos. 44, 257 and 266 (the latter two having by then been renumbered 0257 and 0266), were also withdrawn between 1896 and 1898.〔 The other three locomotives (298, 314 and 329) were transferred to the Bodmin and Wadebridge Railway in 1895, which was one of the earliest railways in Cornwall and isolated from the main LSWR network until that year. These three remained in service because of the sharp curves of that railway's freight branch to Wenford Bridge, which carried china clay traffic to the main line. They were finally withdrawn in 1962 and replaced by GWR 1366 Class 0-6-0PT dock tanks.〔(【引用サイトリンク】 url = http://www.brc-stockbook.co.uk/Beattie.HTM )〕 In 1958, they were noted as "the oldest design still in use on British Railways (although not quite the oldest engines ...)", the latter distinction being given to nos. 32636 and 32670 of the former LB&SCR A1x class, which had been built in 1872. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「LSWR 0298 Class」の詳細全文を読む スポンサード リンク
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